Category
page 1Cancelled NASA satellites
Terrestrial Planet Finder
proposed project by NASA to construct a system of space telescopes for detecting extrasolar terrestrial planets; postponed several times and finally cancelled in 2011
SIM Lite Astrometric Observatory
cancelled NASA space telescope
International X-ray Observatory
cancelled American-ESA-Japanese space telescope project
Fast INfrared Exoplanet Spectroscopy Survey Explorer
proposed space telescope
Constellation-X Observatory
NASA mission concept